• [codecs] Handle errors parameter different from 'strict' for the custom extended mac encodings (#2137, #2132).
• [featureVars] Raise better error message when a script is missing the required default language system (#2154).
• [COLRv1] Avoid abrupt change caused by rounding PaintRadialGradient.c0 when the start circle almost touches the end circle's perimeter (#2148).
• [COLRv1] Support building unlimited lists of paints as 255-ary trees of PaintColrLayers tables (#2153).
• [subset] Prune redundant format-12 cmap subtables when all non-BMP characters are dropped (#2146).
• [basePen] Raise MissingComponentError instead of bare KeyError when a referenced component is missing (#2145).